His lasciviousness in public made people around him feel disgusted.

lasciviousness 是由形容词 lascivious（好色的、淫荡的）加上名词后缀 -ness 构成的名词形式，表示"淫荡、猥亵"的行为或特质。这个词根来自拉丁语 lascivia，原意是"嬉戏、放纵"，后来演变为带有性暗示的含义。